Watchcase.



P. JACOBSON.

WATOHCASE.

APPLIGATION rush 11.1.3.1?, 190s.

908,103. Patented De.29,19os.

vportion of the casing fwindin at its periphery as shown in FRANK JACOBSON, OF CHICAGO, ILLINOIS.

WATGHCASE Specification of Letters Patent.

Patented Deo. 29, i908.

Application filed. March 17, 1908; Serial No. 421,685,

To all whom it may comm a:

Be it known that l, FRANK JAcosoN, citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois7 have invented a certain new and useful Improvement in hiatclicases, of which the following is a specification.

My invention relates to watch cases and the object of the invention is to provide a case which is'substantially dust proof and substantially water proof, also to provide a case in which-the winding and setting of the movement may be effected by rotating a itself about an airisV face of the watch, thus perpendicular to the for a key or winding avoiding the necessity stem. r

I Vobtain my objects by the mechanism illustrated in the accompanying drawings, in which:

' Figures 1 and 2 are front and top views of a case embodying my invention. Fig. 3 is a section of the case taken on the line 3 3 Fig. l. Fig. 4 is a sectional view taken on the line 4-4 Fig. 3. Fig. 5 is a fragmentary sectional view of the winding ring or housing taken on the line 33 Fig. 1. Fig. 6 is a fragmentary sectional view of the annulus taken on the line 6-6 of Fig. 4.

Similar numerals refer to similar .parts throughout the several views.

In this, the preferred form of case, the watch movement or works 10 is held within the annulus `11 by any suitable. fastening means. The standard keyless movements are usually adapted to be inion which in re ty forms no t e case and may assume various A common forni is shown in the drawings, this pinion 12 having a shaft or arbor 13 adapted to extend through the aperture 14 in annulus 11 to meet the movement. A ringl5 is adapted to rotate uponl the annulus 11 and has an annular rack 16 adapted to mesh with and rotate the pinion 12. In the preferred form, in order to render the case substantially dust proof, the ri has an interior annular groove 17 adapte 4to receive pinion 12 and form 'a housing therefor. 'It is also desirable that the,inner edges of the ring make sliding contact, with the annulus 11 in order to exclude dust. The ring 16 may be knurled Fig. 2 or may be smooth as shown elsewherein the drawings andis, under ordinary circumstances,

art o orms.

a swivel of a watch chain or 4for operated by a. a i

for receivingv the fob. The eye 18 to facilitate the provided with an eye 18 when present also serves rotation of the ring l5.

The case has a back 19 and a bezel 20 adapted to hold the glass or crystal 21. The back and bezel are rigidly secured to the annulus 1'1 preferably by means of screw threads, as shown. This makes a practically dust roof case inclosin the movement, the o y aperture for dust e'ing the one 14 which is adapted to receive the arbor 13 of Vthe Winding pinion; but as said pinion is housed within the annular groove 17 in ring 16 the aperture 14 is covered. The ring 415 lies between the back 19 and bezel 20 and as the `proximate surfaces fit closely, they assist in excluding dust. The outside diameters of these arts are all practically equal, thusfimpartmg a finished appearance to the case-in fact the means winding the Works is not gp arent except` upon close examination. t ough for purposes of manufacture it is advantageous that the back 19 and bezel 20 screw into the annulus 11, there'is no other reason Why either the back or the bezel may not be integral therewith.

Having thus described my invention, what I c ain as ,new and desire to secure by `Letters Patent, is:

' 1. A watch itl member and case consisting of a two exterior meml4 4rigidly secured together and having a` cc figuration such as to fornil when 'assembled an annular recess laterally :bounded by plane parallel 'surfaces extending inward to said central member, ay winding pinion mounted in one of the three first-mentioned members having plane parallel tting said recess, sai ring 'bein rotatab relatively to the firstmentione member of the' case and havin an annular rack adapted to operate the win in pinion. 2. In a watch case',l annulus, `adapted to movement, a.winding pinion mounted upon said annulus in position to wind the movement, a rin concentric with said annulus of the case, and a rin surfaces and closely e the combination of an support the Watch and adapte to rotate thereon for rotating said pinion, a bezel screwing onto sai annulus in front of said ring and a back screwing into said annulus behind said rin the outside. bac and ring being substantially the same diameters of said bezel,`

to thereby imperi, a finished appearance to the cose.

3. 1n n watch (um, am combination of en mmulus adapted to swoop the watch movement, a winding pinion for operating the movement, said piuloz; having an arbor adopted to pass through u euioblo aperture in said annulus whereby the .pinion lies upon the outside of the annulus While the movement is oontained within seid ennulus,

`u ring havinr an annuler groove one the inside Lhereo. ada ted 'to form o liousinff 'for the pinion sin h evin n. rack adapted Vtofopereize'seld pinion, a aok and@ bezel screwing onto seidA annulus und yhaving;

surfaces adopted to contactfthe front and beekv surfaces yof said withoutiprevenb ing the rotation thereof, said back. and bezel being 4adapted to be rigidly secured. to said annulus.

4. In a. Watch case, the combination of an onnulus adapted to support the watch movement, a Winding pinion mounted upon said ennulus in position to Wind the movement, a rin concentric with said annulus and adapter to rotate thereon for rotatin said pinion, a, bezel screwing onto sai enmrlue m front of` said rin .end a beck screwing into seid onnulus be' ind said ring, and a projection ri idly secured to seid rin for rotating-it reference to the back sin bezel.

Invwitness4 whereof, Ivhaive lhereuntoSubl scribed my naine in =the presence of tfwo wit- Witnesses:

HoWARoM. COX, C. J.' CHRISTOFFEL. 

